What is ladder if || Java Ladder if statement.

 Ladder if statement

If a if statement is used within an else statement then such a control structure is called as ladder if statement.

Syntax- 

if(condition) 

     Statements.. 

else

     if(condition) 

         statements.. 

    else 

         if(condition) 

              statements.. 

          else …. 

A ladder if is used to check a condition if some other condition is false

1) WAP to read a number and check if it is a positive no. or negative no or zero.

Program:- 

import java.util.Scanner;
public class easy
{
        public static void main(String[] args)
        {
            Scanner likein=new Scanner(System.in);
            System.out.print("Enter a Number:");
            int a=likein.nextInt();
            if(a>0)
                System.out.println("Number is Positive..");
            else
            if(a<0)
                System.out.println("Number is Negative..");
            else
                System.out.println("Number is Zero..");
        }
    }

Output:-

Enter a Number:
7
Number is Positive..

2) WAP to read 3 different nos. a , b and c. and find greatest of them.

program:- 

package com.company;
import java.util.Scanner;
class easy
{
    public static void main(String[] args)
    {
        Scanner likein=new Scanner(System.in);
        System.out.println("Enter 3 different Numbers:");
        int a=likein.nextInt();
        int b=likein.nextInt();
        int c=likein.nextInt();
        if(a>b && a>c)
            System.out.println(a+" is Greatest");
        else
        if(b>c)
            System.out.println(b+" is Greatest");
        else
            System.out.println(c+" is Greatest");
    }

}

Output:- 

Enter 3 different Numbers:
7 14 17
17 is Greatest

3) WAP to read color code i.e. a char value and print appropriate
color according to code.
R - red
G - green
B - blue
any other char-white].

PROGRAM:-

import java.util.Scanner;
class easy
{
    public static void main(String[] args)
        {
            Scanner likein=new Scanner(System.in);
            System.out.print("Enter Color Code:");
            String str=likein.next();
            char ch=str.charAt(0);
//charAt method is used to get char from pos
            if(ch=='r' || ch=='R')
                System.out.println("Red");
            else
            if(ch=='g' || ch=='G')
                System.out.println("Green");
            else
            if(ch=='b' || ch=='B')
                System.out.println("Blue");
            else
                System.out.println("White");
        }

}

oUTPUT:- 

Enter Color Code:
R
Red